How long to take Er Chen Tang to improve phlegm-dampness does not have a clear time, due to personal constitution and other factors, different from person to person, can not be generalized. The composition of Er Chen Tang includes Semixia, Pericarpium Citri Reticulatae, Poria, and Radix et Rhizoma Glycyrrhizae. It has the effects of regulating Qi and harmonizing the middle (regulating the Qi of the spleen and stomach so as to make the spleen and stomach function smoothly), drying dampness and resolving phlegm (removing phlegm from the body by drying dampness). It can be used for the symptoms of damp phlegm. Symptoms include cough with excessive phlegm, white phlegm that is easy to swallow, chest and diaphragm distension, heavy limbs (limb weakness and heaviness), dizziness, palpitations, nausea and vomiting, and white or greasy tongue coating. Phlegm-damp body is the human body phlegm-damp internal, manifested in the body fat, heavy phlegm and other phlegm-damp body state. To relieve dampness and resolve phlegm, strengthen the spleen and replenish qi, Er Chen Tang can be used. Note that Er Chen Tang is contraindicated in cases of Yin deficiency and Blood deficiency, and the adverse effects of this formula are not clear. It should be used under the guidance of doctor’s diagnosis.